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        <h2>效果演示预览：</h2>
        <h3><a target="_blank" href="Canvas连线题-出题-初始化.html">Canvas连线题-出题-初始化</a></h3>
        <h3><a target="_blank" href="Canvas连线题-出题-重绘.html">Canvas连线题-出题-重绘</a></h3>
        <h3><a target="_blank" href="Canvas连线题-答题 - 实例.html">Canvas连线题-答题 - 实例</a></h3>
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